CRASH MODIFICATION FACTORS CLEARINGHOUSE

Study Details

Update of Florida Crash Reduction Factors and Countermeasures to Improve the Development of District Safety Improvement Projects

Study ID: 66

Authors: Gan et al.

Publication Date: APR, 2005

Abstract: This report describes an effort to update the existing CRFs for the Florida Department of Transportation (FDOT) for use in benefit-cost analysis and to develop an automated mechanism to allow continued update of CRFs as new improvement projects become available. As part of this study, a comprehensive literature on the CRF development methods was performed and a state-of-the-practice survey of the State Departments of Transportation was also conducted.

Study Citation: Gan, A., Shen, J., and Rodriguez, A., "Update of Florida Crash Reduction Factors and Countermeasures to Improve the Development of District Safety Improvement Projects." Florida Department of Transportation, (2005)

Study Type: Project Report

Study Report: Download the Study Report Document

CMFs Associated With This Study

Category: Access management

Countermeasure: Install frontage road

Countermeasure: Install median (flush)

Countermeasure: Install raised median

Category:Alignment

Countermeasure: Flatten horizontal curve

Countermeasure: Flatten horizontal curves (10 to 5 degrees)

Countermeasure: Flatten horizontal curves (15 to 5 degrees)

Countermeasure: Flatten horizontal curves (20 to 10 degrees)

Countermeasure: Improve horizontal and vertical alignments

Countermeasure: Improve longitudinal grade

Countermeasure: Improve superelevation

Countermeasure: Improve superelevation (for drainage)

Countermeasure: Reduce horizontal curve angle

Category:Delineation

Countermeasure: Install delineators (general)

Countermeasure: Install delineators (on bridges)

Countermeasure: Install no-passing line

Countermeasure: Install nonvehicular (animal) reflectors

Countermeasure: Install object markers

Countermeasure: Install post-mounted delineators (curves)

Countermeasure: Install post-mounted delineators (tangents and curves combined)

Countermeasure: Place centerline markings

Countermeasure: Place standard edgeline marking (4-6 in)

Category:Highway lighting

Countermeasure: Improve lighting

Countermeasure: Install bridge lighting

Category:Interchange design

Countermeasure: Install acceleration/ deceleration lanes

Category:Intersection geometry

Countermeasure: Addition of left- or right-turn by-pass lanes

Countermeasure: Convert intersection to roundabout

Countermeasure: Install channelized lane

Countermeasure: Install left-turn lane

Countermeasure: Install left-turn lane (double)

Countermeasure: Install left-turn lane (physical channelization)

Countermeasure: Install left-turn lane (with channelization and existing left-turn phase)

Countermeasure: Install left-turn lane (with channelization and no left-turn phase)

Countermeasure: Install left-turn refuge within flush median

Countermeasure: Install right-turn lane

Countermeasure: Introduce painted left-turn channelization

Category:Intersection traffic control

Countermeasure: Add all-red clearance interval

Countermeasure: Convert minor-road stop control to all-way stop control

Countermeasure: Convert STOP control (2-way) to signal control

Countermeasure: Convert STOP control (2-way) to signal control and install left-turn lane

Countermeasure: Increase yellow change interval

Countermeasure: Install beacon (flashing) at intersection

Countermeasure: Install flashing beacons as advance warning

Countermeasure: Install flashing red/yellow signal (MUTCD: intersection control beacon)

Countermeasure: Install larger signal lenses (12 inch)

Countermeasure: Install larger stop signs

Countermeasure: Install pedestrian signal

Countermeasure: Install signal backplates (or visors)

Countermeasure: Install signals (temporary)

Countermeasure: Install signals and add channelization

Countermeasure: Modify change plus clearance interval to ITE 1985 Proposed Recommended Practice

Countermeasure: Prohibit left-turns with "No Left Turn" sign

Countermeasure: Prohibit right-turn-on-red

Countermeasure: Provide actuated signals

Countermeasure: Provide protected left-turn phase

Countermeasure: Remove unwarranted signals

Countermeasure: Replace signal lenses with optical lenses

Category:On-street parking

Countermeasure: Prohibit on-street parking

Countermeasure: Restrict parking near intersections (to off-street)

Category:Pedestrians

Countermeasure: Improve/install pedestrian crossing

Countermeasure: Install pedestrian crossing

Countermeasure: Install pedestrian overpass/underpass

Countermeasure: Install pedestrian signing

Countermeasure: Install sidewalk (to avoid walking along roadway)

Category:Roadside

Countermeasure: Flatten side slopes

Countermeasure: Flatten side slopes (11 to 8 degrees)

Countermeasure: Flatten side slopes (14 to 9 degrees)

Countermeasure: Flatten side slopes (18 to 11 degrees)

Countermeasure: Flatten side slopes (18 to 14 degrees)

Countermeasure: Flatten side slopes (18 to 9 degrees)

Countermeasure: Flatten side slopes (27 to 11 degrees)

Countermeasure: Flatten side slopes (27 to 14 degrees)

Countermeasure: Flatten side slopes (27 to 9 degrees)

Countermeasure: Improve guardrail

Countermeasure: Install animal fencing

Countermeasure: Install barrier (concrete) inside and outside curve

Countermeasure: Install concrete guardrail in median

Countermeasure: Install guardrail (as shield for rocks and posts)

Countermeasure: Install guardrail (as shield for trees)

Countermeasure: Install guardrail (at bridge)

Countermeasure: Install guardrail (at culvert)

Countermeasure: Install guardrail (at ditch)

Countermeasure: Install guardrail (inside curves)

Countermeasure: Install guardrail (outside curves)

Countermeasure: Install median barrier

Countermeasure: Install or upgrade median barrier near gore area

Countermeasure: Install snow fencing

Countermeasure: Install truck escape ramp

Countermeasure: Lengthen culverts

Countermeasure: New guardrail along embankment

Countermeasure: Remove or relocate fixed objects outside of clear zone

Countermeasure: Remove poles by burying utility lines

Countermeasure: Widen clear zone (add 5 ft)

Countermeasure: Widen clear zone (add 10 ft)

Countermeasure: Widen clear zone (add 15 ft)

Countermeasure: Widen clear zone (add 8 ft)

Countermeasure: Widen clear zone (add 20 ft)

Category:Roadway

Countermeasure: Add two-way left-turn lane

Countermeasure: Convert from two-way to one-way traffic

Countermeasure: Convert two-way to one-way roadway

Countermeasure: Implement maintenance and bituminous overlay